staging: rtl8723bs: remove conversion to bool in halbtcoutsrc_Get()

Fix the following coccicheck warning:

drivers/staging/rtl8723bs/hal/hal_btcoex.c:410:59-64: WARNING:
conversion to bool not needed here

Signed-off-by: Jason Yan <yanaijie@huawei.com>
Link: https://lore.kernel.org/r/20200504113251.40791-1-yanaijie@huawei.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>